Pump-plunger.



0. J. KELLER. PUMP PLUNGER.

APPLICATION FILED JAN.14. 1910.

Patented Dec. 6, 1910.

a m N a r a m H M w a UNHED stares Parana omen OTTO J. KELLER, 013 LOSANGELES, CALIFORNIA.

PUMP-PLUNGER.

Application filed January 14, 1910.

T 0 all whom it may concern:

Be it known that I, OTTO J. KELLER, a citizen of the United States ofAmerica, residing at Los Angeles, in the county of Los Angeles, State ofCalifornia, have invented a certain new and useful Pump-Plunger; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to a pump plunger; more particularly to afluid-pressure packing which is especially adapted for use in connectionwith a plunger in a deep well pump, and consists in the peculiarconstruction, combination and arrangement of the parts as set forthhereinafter.

One object of the invention is to provide a packing which shall expandevenly into contact with the barrel of the pump to prevent leakage orthe formation of pockets which trap the fluid.

Another object of the-invention is to provide a packing for a plungerwhich shall be subject to pressure by fluid on its inner side only andwhich shall be durable and efiicient in use, easily replaced when worn,and economical of power in operation.

Other objects and the advantages of the invention will be apparent tothose skilled in the art from a consideration of the followingdescription ofone form of construction in which it may be embodied takenin connection with the accompanying drawings, of which,

Figure 1 is a sectional elevation of a pump plunger having the inventionembodied therein. Fig. 2 is a sectional elevation of a portion of theworking barrel of a pump, showing the plunger and standing valve inposition therein. Fig. 3 is a horizontal section on line 3-3 Fig. 1, andFig. l is a horizontal section on line 4 4 Fig. 1.

Referring now to the drawings, 1 indicates the packing which may be ofany approved material and which encircles the tube 2. This packing ispreferably secured tightly at its upper end to tube 2, this tightconnection being eflected by vulcanizing the packing to the tube or inany other desired manner. A ferrule 3 may be placed over the upper endof packing 1 to aid in effecting this tight connection and to preventthe upper end of the packing from being injured.

As shown in the drawings, packing 1,

Specification of Letters Patent.

Patented Dec. 6,1910.

Serial No. 538,115.

with the exception of the part near the top, is loose on tube 2;sufficient space being left between the packing and the tube to permitof liquid passing up between them. Packing 1 is secured at its lower endby vulcanizing or in other suitable manner, 011 the inside of the upperend of a sleeve 5. A ring 6 of suitable material may be placed insidepacking 1, between the latter and tube 2, and expanded therein by anywell-known means to protect the lower edge of the packing and furtherassure of no liquid passing between sleeve 5 and packing 1.

Tube 2 and sleeve 5 preferably extend downwardly below packing 1 and maybe secured by external and internal threads 7 and 8, respectively, to avalve casing 9 which may be of ordinary construction as it forms no partof this invention. The valve casing here illustrated contains a ballvalve 10 seating on a seat 11, lugs 12 serving to re tain it within thecasing on the downward stroke of the plunger.

Tube 2 may be formed with one or more perforations 14, preferably placedin that portion thereof extending below packing 1, the purpose of whichis to permit a portion of the liquid being pumped passing into the space15 between the lower ends of tube 2 and sleeve 5 and thence into thespace between the tube and the packing 1 which will cause the latter toexpand and press against the barrel, indicated at 16 (Fig. 2) of thepump. The reason for the particular location of perforations 14: is thatthe liquid is thereby caused to enter the space between packing 1 andtube 2 uniformly around the whole periphery thereof which causes auniform pressure by the column of liquid to be exerted on the packing topress it evenly into contact with the working barrel and therebyincreasing the efficiency of the packing and permitting it to be usedlonger without renewal.

18 indicates a cage of ordinary const-ruc tion which is adapted to bescrewed over the upper end of tube 2 and has the lower end of the usualsucker rod connected at its upper end. A lock nut 19 may be provided tolock cage 18 on tube 2. The outside periphcries of the lower portion ofcage 18, when it is screwed on tube 2, and of lock nut 19 and ferrule 3are preferably cylindrical and of a diameter equal to the normal outsidediameter of packing 2. This construction, which the particular manner ofexpanding the packing permits, also tends to lengthen the life of thepacking as it then presents no exposed shoulder to be frayed and worn bythe weight of the liquid bearing down on it.

The standing valve 21, shown in the lower end of barrel 16 of the pumpis of usual construction and forms no part of the invention.

16 above the plunger causing the packing to be expanded evenly intocontact with the barrel to prevent the leakage of liquid there betweenor the formation of pockets to trap the fluid.

Although one form of construction in which the invention may be embodiedhas been illustrated and described, it is obvious that various changesand modifications may be made therein and the right is reserved to allsuch changes and modifications as come within the spirit and scope ofthe invention as defined in the appended claims.

I claim:

1. In a pump plunger, in combination, a tube, a fluid-pressure packingencircling said tube, said tube extending beyond said packing, a sleeveconnected to the packing and encircling and spaced from the extendedportion of the tube, and means permitting the passage of fluid from thetube to the space between the latter and the sleeve and thence to thespace between the tube and packing.

2. In a pump plunger, in combination, a tube, a fluid-pressure packingencircling said tube, said tube having a portion thereof extendingbeyond the packing, said extended portion being perforated, and a sleeveencircling said perforated portion of the tube, said packing and sleevebeing spaced from said tube to permit passage of fluid from theperforations in said tube to said packing.

3. In a pump plunger, in combination, a tube, a fluid-pressure packingencircling said tube and connected to it at one end, said tube having aportion thereof extending beyond the packing, said extended portionbeing formed with perforations, and a sleeve connected to the packing atthe other end and encircling the perforated portion of the tube, saidpacking and sleeve being of sufiicient inside diameter to leave a spacetherebetween and the tube.

4. In a pump plunger, in combination, a'

tube, a fluid-pressure packing encircling said tube and connected to itat its upper end, said tube having a portion extending below thepacking, said extended portion being formed with perforations, a ferruleinclosing the upper end of the packing, a sleeve inclosing the lower endof the packing and also encircling the perforated portion of the tube,said packing and sleeve being spaced from said tube to permit passage offluid from the perforations in said tube to the space between the latterand the sleeve and thence to the packing, and means for holding theinclosed lower end of the packing tightly against the sleeve.

5. In a pump plunger, the combination, a tube, a fluid-pressure packingloosely encircling said tube and connected to it at its upper end, saidtube having a portion extending below the packing, said extended portionbeing formed with perforations, a ferrule inclosing the upper end of thepacking, a sleeve inclosing the lower end of the pack ing and alsoloosely encircling the erforated portion of the tube, an expandec ringplaced within the lower end of the packing to force it against thesleeve, and means for closing the space between the lower ends of thetube and sleeve.

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing witnesses at Los Angeles, county of LosAngeles, State of California, this 7th day of January A. D. 1910,

OTTO J. KELLER

